The development of cars has been good in some ways and bad in others. The car has allowed for better transportation but it is also responsible for a great
deal of pollution. Which activity helps solve the pollution problem through the
use of new technology?
A. Building fewer cars
B. Encouraging people to walk more
C. Encouraging people to ride a bus
D. Building cars that give off less pollution
SUBMIT

the answer is c) abandoned properties that are contaminated with hazardous materials.

d. planting trees

the trees take in carbon to make oxygen.

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.